Stropping and like machine.



,1. J. Pos1111sj. VSTROPPHIG AND LIKE MACHINE.

APPLIOATION FILED NOV. 5, 1912.

Lmgg@ Patented 001.1111113.

z SHEETS-SHEET 1.

A. J. POSTANS. STROPPING AND LIKE MACHINE. APPLICATION FILED NOV. 5, 1912.

Patented Oct. 14, 1913.

2 SHEETS-@HEBT 2.

UNITED STATES ARTHUR JAMES POSTANS,

OF BBENTFOBD, ENGLAND.

,STRGPPING AND LIKE MACHINE.

To all lwhom it may concern.'

Be it known that I, ARTHUR JAMES Pos Tens, a subject of the King of England, residing at Brentford, Middlesex, England, have invented ccrtainnew and useful lmprovements in Stropping and like Machines, of which the following is a specification. Thispinvention is for improvements in or relating to stropping and like machines of the type wherein a ymachine is reciprocated relatively to a band or vice versa and contains parts which are so engaged by the band that the relative movement of the machine and band causes a buliing member to be rotated and a blade-holder to be rocked to bring the blade which yis to be stropped or sharpened first against such buling member and then away from it.V

The present invention consists in the specific construction of a machine of this type wherein there is combined with a driving pulley havin positive operative combination with the uff-spindle and a driving pulley for a bladeholder of a friction device interposed between the last-mentioned driving pulley and the blade-holder so that slip can occur between these two parts whereby the d. ree of pressure of the blade against the'bu is always maintained constant.

- them, for example the bulf, is traversed third pulley were absent.

along in the lmown manner by means of a worm-feed.

Another feature of the construction consists in arranging this worm-feed within the handle of the apparatus.

Another feature of the invention consists in the construction of the casing comprising two separable parts between which pulleys are mounted and which provide bearings 'for the blade-holder and bui-spindle that project through from one side of the casing. To give the driving-band sulcient grip upon the pulleys, a third pulley staggered relatively to theother two is preferably employed, so that by delecting the band around this third pulley it mayv be made to engage a larger surface of the other two pulleys than would be the case if the In the accompanyin drawings which illustrate one method o carrying out this invention x-Figure 1 is a 'perspective view 0f the machine; Fig.` 2 is a horizontal secl Specification of Letters Patent.

Patented oet. 14, 191s.

Application led November 5, 1912. I Serial No. 729,588.

The casing of the apparatus comprises y two separable parts A, A1 respectively. The part A 1s recessed to receive two drivingpulleys B and C and an idle pulley D, and

the two parts together provide bearings for the blade-holder spindle E and buff-spindle F. These two spindles project from the caslng on one side and within the casing extend through the pulleys B and C respectively. The pulley B has a hollow cylindrical eX- tension B1 on one side which lies in a recess formed in an extension A2 on the A of the casing. The spindle E projects into this extension and is prevented from endwise movement by a washer and screw E1 E2 let into a recess in the extension. A

art4

plug .A3 is screwed into the recess in the.' end of the extension E1 which recess is madef85 to receive the washer and screw E1 E. pulley B is prevented from axial movement y the sides of the casing and the extension A2 and the casing supports it by providing a bearing for the extension B" on` the pulley. Drivin connection between the spindle and the u ley is of a frictional character and is e ected by three loose resilient strips or plates E4 which are s0 mounted in the hollow extension BlL that they bear against the interior walls of the extension and also against the spindle E, being arranged in the vform of a triangle as is clearly shown in Fig. 4.

The idle pulley D is mounted on a in D1 fastto the casn portion A and is o set relatively to the pu leys B and C.

The spindle F carries a circular bui F1 and passes through the pulley C in to an extension A4 on the casing part A which extension carries a hollow handle G. Mounted in the extension or formed therein is a tube or sleeve X having a worm A and the spindle F has fast on it a pin F2 that coo crates with the worm.` Fast on the pulley Cp is a. lug C1 and carried by the indle F is a collar Fa havinga lug F4.

The v e collar intense has in it teather F5, Fig. 4, which ena groove l?? in the s indie l?. so that the spindle can move aria ly through the collar although the collar and spindle must rotate together as one; the collar is pre- :rom endwise displacement on one side by the pulley C and on the other side l which projects into tie slotted portion and is kept in osition by a spring la that in turn is held in place by a cap E screwed over the enlarged end E3.

The blade ll to be used with this strop has a notch H1 at each end and when the blade is in position in the holder as shown in lge. 2 and 5, one notch engages the pin .s and the other the s ring-controlled ball E9. The two Darts A 1 ot the casino' may be heldl together by screws for whic the holes J are shown in the part fr, Fig. 3. The part if thus constitutes a cover-plate which can be removed after releasing the screw E: whereu on all the parts can be drawn out from t e other portion A of the casing.

il. driving-belt K which is non-continuous, is passed through a hole .lill in one side of? the casing, around one side of the pulley E, thence around the idle pulley D, reni which it passes around one side ot the pulley C and leaves the casing by another hole K2. The end of this belt may be provided with any convenient means for holding it, such as a couple otrings, one at each end, or loops, or a ring K8 and loop K4.

The operation of thisl device is as follows :-To insert a blade in the holder one end is first introduced into the slot so that its notch H1 is made to engage the pin and then the blade is turned Aabout this pin so that the other end is pushed past the ball E whereupon the latter snaps into the notch lll at that end of the blade and thereby secures the blade in the holder, One end or the band l, Jfor example the loop l, is then hoolted over any convenient support and the operator holds the ring K3 in his hand and pulls the band tight. By means of the handle G the whole device can then be traversed backward and forward along the band l. With the parts in position shown in Figs. l and 2, the machine is'being traversed toward the ring l@ 'and has nearly reached the end of the operative portion of its travel. The pulley C is being rotated inthe direction of its arrow, rFig. 3, and the lug; C* is therefore heV t up againstthe lug .llt et the sleeve im. 4fhis y'sleeve by means or its hey Fs is thereforeI rotating the but@ along spindle F, and the pin'F2 carried by the spindle-fis traversing the worm A so that the spindle is traveling outward from the casing A A1 toward the end of the blade H. Simultaneously the movement of the machine-along the belt l is attempting torome the pulley n in um direction or the n row placed beside it in Fig. 3, and by means of the friction device E* a torsional strain isput u on the spindle E which keeps the edge of t icblade H pressed against the butt F1- As thev buil` travels along the edge o' the blade l 'and at the same time rotates u'ainst it,'the'whole of the edge is stropped. When the buil-spindle F comes to theend of its travehthe pulle C will merely slide the driving-ban K if the machine is still moved toward the ring K3, but as the resistance to movement is doubled by this sliding, the operator immediately feels the check and'commcnces to move the machine in theopposite direction, that is, toward the loop K4. At the first movement in the reverse direction, the pulley B rotates in a direction opposite'to that indicated by its arrow, Fig. 3, and thus rocks the bladeholder in such direction as to swing the blade over until its op osite edge rests against the buil F1. During the whole, or at all events, the earlier part of this movement, the bud is stationary because the direction of rotation of its pulley C is also reversed and therefore the operating lug C1 is carried away from the lug lN and has to be carried through a considerable part of a revolution before it comes into contact with the opposite side of the lug F4. As soon as it does again come into contact with the lug, the spindle F commences to rotate in the direction posite to that in which it was traveling when the blade was in the other osition, so that it now rotates in such direction as to strop the blade in its new position and commences to travel from left to right of Fig. 1l instead of richt to lett as before. The buil continues tbhus to rotate and travels along the blade until it reaches the end of the same, when the machine being again reversed, the same reversal of the ports takes place and that side of the blade originally stropfped is again stro ped. This reciprocation o the machine anc the corres ending reversal of the parts can be carried out rapidly and for any length of time until a satisfactory edge has been produced on the razor-blade, after whichtheblade can be removed by-merely pulling that end forward which is held by the ball, where upon it will be released from the holder.

- lathe case of double-edged razors, it mav be desired'tostrop both the edges simultan ously. lFor this Cpurpose two bulls L, L1 Wou be employe each mountedon spindles L'ft'simillar to the spindle l? and'provided, each, with a driving pulley-L3 and worm lill) feed mechanism as described with reference to the spindle F. The blade-holder M would be mounted between the twobui'i spindles and arranged to carry the double-edged blade in any convenient manner, which there is no need to describe in detail as such holders are well-known and the holder in itseli forms no part of the present invention. The spindle of the holder instead of carrying a pulley would carry a toothed wheel M1 and this would engage with a second toothed-wheel M2 mounted'direct or upon a part secured to an idle pulley M3. The idle pulley would be staggered relatively to the pulleys L3 and the driving-band N passed around the pulleys L3 and idle pulley M3 in the manner shown in Fig. 6. It will be seen that by traversing this machine along the band N' in the same way as has been described with reference to the other orms shown in Figs. l-, the buis will both operate; simultaneously, in the same manner as the builc F1 and the blade-holder will rock at each reciprocation to bring the opposite sides of the blade against the buds. A frictiondevice will of course be inserted between the spindle of the blade-holder and the toothed wheel M1 in the same manner as was provided between the spindle E and the bladeholder E5 and its pulley B.

Obviously any kind of blade can be stropped with the machine described in this invention, the holder therefor being shaped according to the blade as is common practice in stropping devices.

`What I claim as my invention and desire to secure by Letters Patents is 1. In a stropping machine, the combination of a casing constructed to provide a handle; a spindle mounted to rotate in said casing and constructed to hold the blade to be sharpened; a pulley journaled in said casing and having frictional driving engage nient with the spindle; a tube mounted in the casing handle and Jformed with a. spiral groove; a spindle mounted to rotate in said tube and having a part engaging within the spiral groove thereof whereby to reciprocate said spindle; a pulley havingsplined connectio-n with said last named spindle; a buer mounted on said spindle und means for operating said pulleys.

2. In a stropping machine, the combination of a casing constructed to provide a handle; a spindle mounted to rotate in said casing and' constructed to hold the blade to be sharpened; a pulley journaled in said casing and having rictional driving engage` nient with the spindle; a tube mounted in the casing handle and formed with a spiral groove, a spindle mounted to rotate in said tube and having a part engaging within the spiral oove thereof whereby to reciprocate said spindle; a collar splined on said spindle and provided with a lug; a pulley journaled on the spindle and having a lug adapted to engage with said collar lug Jfor rotating the spindle; a buiier mounted on said spindle; and means for operating said pulleys.

3. In a stropping machine, the combination of a casing constructed with a hollow handle; a pulley having a cylindrical eXtension journaled in the casing; spindle journaled in the casing; resilient plates mounted in said cylindrical extension and having rictional driving engagement with the spindle; a tube mounted in the casing handle and formed with a spiral groove; a spindle mounted to rotate in said tube and having a part engaging within the spiral groove thereof whereby to reciprocate the spindle; a collar splined on the spindle and provided with a lug; a pulley journaled on the spindle and having a lug adapted to engage with either side of the collar lug for rotating the spindle; a buier mounted on said spindle; an idler pulley journaled in the casing adjacent said spindle pulleys; and a belt passing through the casing and engaging with all of said pulleys for operating the same.

4. In a stropping machine, the combination of a separable casing comprising two sections, one of said sections providing recesses; a pair of spindles journaled in said casing and having portions projecting to one side thereof and disposed in parallel relation, one of said spindles constructed to hold the blade to be sharpened; a butler mounted on the other of said spindles; a pulley journaled in one of said chambers and havin rictional driving engagementwith sai blade holding spindle; a pulley journaled on the buffer spindle and having driving engagement therewith; means for causing the buiier spindle to reciprocate; and a belt passing through the casing and having engagement with said pulleys for operating the same.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

ARTHUR JAMES PGSIANS. lVitnesses:

C. TUewooD, E. F. GARDNER.

a blade holding 

